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-rw-r--r--virt/kvm/kvm_main.c23
1 files changed, 14 insertions, 9 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 587e1a0a8715..acc951cc2663 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -805,20 +805,25 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
* sorted array and known changed memslot position.
*/
static void update_memslots(struct kvm_memslots *slots,
- struct kvm_memory_slot *new)
+ struct kvm_memory_slot *new,
+ enum kvm_mr_change change)
{
int id = new->id;
int i = slots->id_to_index[id];
struct kvm_memory_slot *mslots = slots->memslots;
WARN_ON(mslots[i].id != id);
- if (!new->npages) {
- WARN_ON(!mslots[i].npages);
- if (mslots[i].npages)
- slots->used_slots--;
- } else {
- if (!mslots[i].npages)
- slots->used_slots++;
+ switch (change) {
+ case KVM_MR_CREATE:
+ slots->used_slots++;
+ WARN_ON(mslots[i].npages || !new->npages);
+ break;
+ case KVM_MR_DELETE:
+ slots->used_slots--;
+ WARN_ON(new->npages || !mslots[i].npages);
+ break;
+ default:
+ break;
}
while (i < KVM_MEM_SLOTS_NUM - 1 &&
@@ -1054,7 +1059,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
memset(&new.arch, 0, sizeof(new.arch));
}
- update_memslots(slots, &new);
+ update_memslots(slots, &new, change);
old_memslots = install_new_memslots(kvm, as_id, slots);
kvm_arch_commit_memory_region(kvm, mem, &old, &new, change);